I have a site in French and Dutch. All French pages in the site are duplicated in Dutch. From all French pages I can go to the Dutch version with no problem. From the homepage I can go back and forth from French to Dutch, but from the menu pages I can go from French to Dutch, but once I am on the Dutch version and want to go back to French I get a Module not Found error. (Error / kernel (20) ) Except for the 'News' page which is labelled the same in both languages.
I thought it might have been a problem with my setup, but I just tried on the demo version on this site and got the same problem.
Does anyone have any idea of what is causing this and how I can fix it.
You'll need to fetch the correct url alias as 3.10 and 4.0 has different urls pr locale. http://ez.no/developer/contribs/hacks/fetch_multilingual_url_alias_by_locale